[IDV #BLL-132210]: Cannot do a simple difference of two grids

Hi, Robert

Yes, it returns a missing value on the difference grid.

-Julien

> Thanks.  I'm wondering what happens when I subtract two grids and one
> has a missing value?  Does it return a missing value on the difference grid?
> 
> Unidata IDV Support wrote:
> > Hi again, Robert
> >
> > I chatted with Don Murray about this issue, and he gave me a few hints. I 
> > believe it would work with sub(a,b). In general, when using grids, one 
> > should use sub, add, mul, quo instead of -, +, *, / since the former handle 
> > differences in manifold dimensions.
> >
> > Thanks.
> >
> > -Julien
> >
> >
> >> Hi, Robert
> >>
> >> Would it be possible to have a bit more information about this problem? 
> >> What are the steps necessary to get this error? Also, I loaded the 
> >> attached bundle.xidv but I am having trouble finding 2 files:
> >>
> >> 20100813.14z.ECONA.grib2
> >> 20100813.14z.ECONA.grib2
> >>
> >> Would it be possible to attach those as well.
> >>
> >> Thanks.
> >>
> >> -Julien
> >>
> >>
> >>> Full Name: Robert Aune
> >>> Email Address: address@hidden
> >>> Organization: NOAA/NESDIS
> >>> Package Version: 2.6u2 build date:2009-02-13 19:03 UTC
> >>> Operating System: Windows XP
> >>> Hardware: Java: home: C:\Program Files\IDV_2.6u2\jre version: 1.6.0_11 
> >>> j3d:1.5.2 fcs (build4)
> >>> Description of problem: Creating image sequence
> >>> org.python.core.PyException
> >>>
> >>> ******************
> >>> Stack trace:
> >>> Traceback (innermost last):
> >>> File "<string>", line 1, in ?
> >>> at visad.Gridded3DSet.valueToGrid(Gridded3DSet.java:759)
> >>>
> >>> at visad.Gridded3DSet.valueToIndex(Gridded3DSet.java:415)
> >>>
> >>> at visad.FlatField.resample(FlatField.java:4739)
> >>>
> >>> at visad.FlatField.binary(FlatField.java:2088)
> >>>
> >>> at visad.FieldImpl.binary(FieldImpl.java:835)
> >>>
> >>> at visad.DataImpl.binary(DataImpl.java:139)
> >>>
> >>> at visad.DataImpl.subtract(DataImpl.java:192)
> >>>
> >>> at visad.DataImpl.__sub__(DataImpl.java:1400)
> >>>
> >>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>>
> >>> at 
> >>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >>>
> >>> at 
> >>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>>
> >>> at java.lang.reflect.Method.invoke(Method.java:597)
> >>>
> >>>
> >>> visad.SetException: visad.SetException: Gridded3DSet.valueToGrid: 
> >>> ManifoldDimension must be 3
> >>>
> >
> > Ticket Details
> > ===================
> > Ticket ID: BLL-132210
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> --
> Robert M. Aune
> Research Meteorologist, Advanced Satellite Products Branch
> COoperative Research Program
> Center for Satellite Applications and Research
> DOC/NOAA/NESDIS
> 1225 W. Dayton St., Madison, WI 53706
> Ph: 608-262-1071      Fax: 608-262-5974
> 
> 


Ticket Details
===================
Ticket ID: BLL-132210
Department: Support IDV
Priority: Normal
Status: Open